Prosecution Insights
Last updated: July 17, 2026
Application No. 18/282,901

AIR CONDITIONING SYSTEM, REFRIGERANT AMOUNT ESTIMATION METHOD FOR AIR CONDITIONING SYSTEM, AIR CONDITIONER, AND REFRIGERANT AMOUNT ESTIMATION METHOD FOR AIR CONDITIONER

Non-Final OA §112
Filed
Sep 19, 2023
Priority
Mar 31, 2021 — JP 2021-062276 +1 more
Examiner
CRENSHAW, HENRY T
Art Unit
3763
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Fujitsu Limited
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
91%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
766 granted / 1007 resolved
+6.1% vs TC avg
Strong +15% interview lift
Without
With
+15.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
5 currently pending
Career history
1014
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
81.1%
+41.1% vs TC avg
§102
2.9%
-37.1% vs TC avg
§112
13.8%
-26.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1007 resolved cases

Office Action

§112
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . This action is in response to the filing made 1/28/2026. Priority This action claims the benefit of JP 2021-062276 filed 3/31/2021, and PCT/JP2022/007461 filed 2/24/2022. Receipt is acknowledged of certified copies of papers required by 37 CFR 1.55. Election/Restrictions Applicant has elected Group III, directed to claims 20-33, without traverse. The following claims are withdrawn: 1-19, 34-38. Claims 20-33 are under examination. Allowable Subject Matter The claims will be allowable provided that the 112 rejections are overcome, subject to a new search once the claims are clarified. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 20-33 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 20 Line 7 of the claims claim recites, “first processing circuitry” which is used to detect a “state quantity”. The term “processing circuitry” does not appear in the specification. Further, how does such “circuitry,” without additional structure, such as a sensor, detect anything? The claim recites, “estimate a remaining refrigerant amount of the refrigerant that remains in the refrigerant circuit by using a detection value of a first feature value . . . . .”. The claim later recites, “determine whether or not the detection value of the first feature value is a detection value that is to be used to estimate the remaining refrigerant amount performed by the estimating.” Why is a determination being made on whether to use the feature value to estimate the refrigerant, after it has already been used to estimate the amount of refrigerant? The distinction between the “detection value of the first feature value” and the first feature value itself is not clear. Claim 21 The claim recites, “from among the state quantities”. There is a lack of antecedent basis for “the state quantities”. Parent claim 20 only refers to “a state quantity”. The distinction between the “second feature value” and the “detection value” (of the second feature value) is not clear. Claim 24 The claim recites, “the determination model calculates, by adopting the second feature value that is used to generate the determination model as a normal sample value”. This is not clear. If the second feature value is used to “generate” the determination model, then it would appear that it has already been adopted. Claim 25 The meaning of “estimated by unit estimating” is not clear. Claim 31 The claim recites, “a refrigerant temperature sensor” that detects the inlet temperature and outlet temperature of the indoor unit. It is not clear how a single sensor detects temperature in both location. Potentially Allowable Subject Matter The closest prior art of record is US 2009/0025406 to Yoshimi. Regarding claim 20, Yoshimi teaches an air conditioner that includes a refrigerant circuit that is constituted to have a structure in which at least one indoor unit (4,5, par. 86) is connected to an outdoor unit (2) by a refrigerant pipe and a predetermined amount of refrigerant is filled, the air conditioner comprising: an first memory (par. 136, in controller 8, par. 136), ; and first processing circuitry (controller 8), coupled to the first memory and configured to: detect a state quantity (by any of the sensors in Fig. 2, connected to controller 8) related to control of the air conditioner; acquire a detection value (sensor readings, see 112 rejection) that has been detected by the detecting; estimate a remaining refrigerant amount of the refrigerant that remains in the refrigerant circuit by using a detection value of a first feature value in a case where a state quantity related to an amount of the refrigerant that is filled in the refrigerant circuit is indicated by the first feature value; (abstract) Yoshimi does not teach, determine whether or not the detection value of the first feature value is a detection value that is to be used to estimate the remaining refrigerant amount performed by the estimating. Claims 21-33 depend from claim 20. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to HENRY T CRENSHAW whose telephone number is (571)270-1550. The examiner can normally be reached M-F 9:00 am to 5:00 pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, JD Fletcher can be reached on 571-270-5054. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /HENRY T CRENSHAW/Primary Examiner, Art Unit 3763
Read full office action

Prosecution Timeline

Sep 19, 2023
Application Filed
May 14, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12679170
A METHOD FOR CONTROLLING VEHICLE AIR-CONDITIONING SYSTEM AND A COMPRESSOR TO WHICH THE METHOD IS APPLIED
2y 5m to grant Granted Jul 14, 2026
Patent 12674607
DYNAMIC FINE-TUNING REFRIGERATION SYSTEM
2y 7m to grant Granted Jul 07, 2026
Patent 12674601
AIR CONDITIONER CONTAINING DRAIN PAN AND REFRIGERANT SENSOR
2y 3m to grant Granted Jul 07, 2026
Patent 12674608
Refrigeration Systems with a First Compressor System and a Second Compressor System
2y 1m to grant Granted Jul 07, 2026
Patent 12663188
HEAT SOURCE UNIT AND AIR CONDITIONER
2y 4m to grant Granted Jun 23, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
76%
Grant Probability
91%
With Interview (+15.1%)
2y 10m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1007 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month